Expansion valve



FIG. 1 is a perspective view from a top side of an expansion valve showing our new design;

FIG. 2 is a perspective view from a bottom side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right side view thereof, left side view being symmetrical to the right side view.

The broken lines depict portions of the expansion valve that form no part of claimed design. 

CLAIM The ornamental design for an expansion valve, as shown and described. 